Improvement in steam-boilers



J. L. P'RISBIE.

STEAM BOILBR.

Patented Jan. 24, 1871.

' jmfnmes /w waited" tate Jour L. muslim,

two *cina ornuoonLrNeN.. fr.; AssieNon rro MARSHALL fr DAVIDSON, IOF'SAME PLACE.

1mm raient No. 111,191, dated Jamey 2'4, 1871.

IMPROVEMENT IN STEAMBOILERS.

The seneauie referred :o mtime Lee-tm Parent ene mung part of una ax1ue.l

' all whom it concern Be it known that I, Jol' L. Fiumara, of Brooklyn,in the county of Kings and State ofNew-Yorlr, have `invented 'a' new anduseful Improvement in Stearn-A vZoiie'ra'of which 'the following is aifull, clear, and exact description, reference-being `had to theaccompanying drawingi'orming part ofthis speeication, and

in which.

' Figure 1 represents `a. plan view of a steam-boiler constructedaccording to my improvement, with the smoke-box removed Figure 2,. acentral vertical section of said boiler;

Figure 3, a horizontal sectionftaken as denoted by the line a: 4:15iniig. 2'; and

Figure4, afurtherhorzontalseotiou,througirtlle line--y y.

applicable asa Apower-boiierlfor driving machinery,

and has vforits object economy ot fuel', together with a rapidsteam-producing capacity, and Vbeing'wholly ormainly ofcast-i1on,.cheapness of construct-ion, corm-v bined withv safety,durability, andsecurity against leak'- age and collapse. e In theconstruction and arrangement of itsparts,

said boiler embraces a lower central lire-chamber, surrounded'` orformed by an annular water-leg, preferably having ailuted exteriorbverhanging water-chamber, from which project verei tical water-tubes,arranged in concentn'c rows and couneeting at their upper ends with themain body of the boiler, also through which and the annularwater-'chamber, .at their b ase,the smoke-tubes pass. A

vSaid rc1-'tical watentubes, annular base-chamber,

and lower water-leg, are all arranged within a heatingspaceiorl chamber,to' which the products of combustion pass from the central tire-chamberthy escape between the concentric rows of yer-ticaltubes, from 'thencedown and around the .at their base', and up through the smoke-tubes tothe smoke-box.

The smokeftirbes' are secured on orto the crownsheet of the vboiler byforming said tubes-with a flange onthemat aflittlc :distance from-theirtops, which anges made to liciagaiust theiouter -snii'aee of thecrown-sheet, and is borne downv thereon by a gland' fitting over theupper projecting end of the tube, andv screwing ihto asurroundingsoeketedprojection on the erowhlsheet. .This forms a s impleand securemode of. attachment,l both against internal' pressure -and externalpressureor collapse.

.B of thebolei'. and mounted byvan annular lchamber F, wit-hin. and ,upthe water-tubes- GSG, and

annular water-chamber Referring tothe accompanying drawing, theLboiIeras" there/represented, and which is' made wholly or mainly of'east-iron, tubes and' all, though wroughtmetal smokeetubes may beinserted, if preferred, is

composed ofjtwo' prominent or leading parts, namely,

a lowfer portion, A, and upper portion, B, which late ter, that formsthe body'of the boiler, is secured'by a lower flange, a, and bolts tovauupper flange, b, on the lower portionA. j u

reihis last-mentioned flange?) is Vformed by an'extensionof the topplate ofthe `lower portion A, which plate constitutes the bottom o fthe. body B or erown` sheetof the tire-chambery and which plate, at itsangefpoitiou, rests on and incloses at its top a heatretaining andcirculating-chamber, O, of brick-work, that is, made of or lined withfire-clay, said chamber encompassingthe whole 'of the lower portion A ofthe Thispoition A rests, by means of a4 bottom. annu-v lar water-deg,'1)011 the` bottom of said chamber, the re on,y products of combustionpassing from the* Yreqilace E'up through vthe interior'cof saidwaterleg' that thus also forms a fire-chamber.

' Cast ou the upper portion of this water-leg is an annular overhangingwater-chamber,'1, of lesser exterior diameter than the inte-rior of `thechamber `C, sous to allowfof, thev products voieombustion passing its.

` G Gr are' vertical water-tubes, arlauged in` conoen` -tric rows,w ithfire-spaces in .between them, audieon;

u ecting the yannular water-chamber F with. thebody H Hi aresmoke-tubes, passing up ythrough` the through the. body B ofthe -boilertothe smoke-box I. If desired, there also' may be av central smoke-tube,H', connecting ,in a direct manner the smoke-box I with a dome-shapedspace formed by the crown-sheet Y of the tire-chamber.

:In the-operation of the boilexgwhieh shouldbeprof vided with suitablevinlets and' outletstor feeding it" and drawingor blowing o therefrom,vthe heated gasesyand'produets of combustion iirst pass from thelireplace E up through the interior of the water-leg D from thencearound and between thewatertubes Gf 2 to" thc heat-retaining chamber 'Odown said chamber around-theaunular water-chamber or water-tubehasc"LB5-Parm'1ndjthc exterior of the water-leg'D, which vis i 4tinted o r.corrugated, as shown in tig.'4, to give it ad- 4ditional strength andheating'suriiice; and from thence uplthrongh the smoketubes G to the`slnoke-bx Iv' 'lhis -combination and arxnngeniutof parts areboth,eilicientand cconomicah-N'.'

I furthermore propose izo-'secure the smoke-tubes`H` in or to thecrown-sheet fd of the boiler by forming cach of 'said tubes with a ange,e,-' near its upperend', 'which fiange lies .ontlie outside surface o f-said.

sheet; and is berne d'own thereon rby a' gland,j;` arranged'to t.vernthe projecting opper end of fthe tube, audto screw into a socket,g, cast' onv the plate o d, within whieh'socket the langee of thetubelies'. T lxis'modeof attachment provides against'inim'y oraceident,.`either byl internal or external pressure. l Whenthe-,boileris 'used forl dome'stcvpurposesit may be arranged witliinanexterior' chamber, J,1of brek-work, from'which-chamberpipes h h may beled tc'convey' heated air, as derived by radiation from' the jboiler anditslsettingto upper apartmentsor-,else-h What is'here claimed,anddesired to besecured l by Leiters Patenti ,iS-

1. The combinationand arrangement ofthe waterleg D, the annularwater-chamber F, vthe water-tubes G, the ,heating-chamber.0thesmoke-tubes H, and the body B, substantially as specified.

essentially as shown -anddescribed- 4 l JNO. L. 'FRISBIEy Witnesses: I,i

` FRED. Eems,

R. E. Bumm.

' 2. The smoke-tubesH, secured asdeserbed .to .the 4 ycrown-sheet oftheboiler by ,means of ,Bauges e, inf

combination with the glands f and sockets g'o'n'said sheet, and intowhich't-he glands arefmade to'jscrew,

